My sister, and only sister was diagnosed with Bi polar 2, and has ghosted me for the last half year without explanation. The last interaction I had with her that triggered the ghosting was my cousins funeral, my mother and I were supposed to meet my sister after the funeral for dinner. She said she would meet us, and as usual, ended up flaking out. I had sent her a message asking her to be more communicative next time, and let us know in advance if she cant come. After that I was ghosted. I am typing this after having Christmas with my family where my sister and I didn't say a word to each other the entire time, which I sensed was hurting my family. (Causing my parents pain.) During the months of ghosting I have received from my sister, I have tried repeatedly to contact her and ask what is wrong. If we can talk it out. I get no answer. I tried after Christmas, nothing still. I am not sure what to do, I cant explain the pain, hurt, and nightmares I have had during this ordeal. It has put me into quite the depression, and haunts my mind every day. It just does not seem normal. We have been friends and I have been there for her so many times. She hasn't been there for me, and can drop me without hesitation and remorse. It seems almost unhuman. My parents just let it happen, I have tried to get support from them and have not gotten any help. Any comments back or advice would be appreciated. I am thinking of blocking my sister and getting therapy to try to get out of the depression.